Long-term monitoring of primary production in coastal waters by an improved natural fluorescence method
Long-term monitoring of primary production in coastal waters by an improved natural fluorescence method
复制标题
采用改进的天然荧光法对沿海水域初级生产进行长期监测
DOI：
10.3354/meps273017
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发表时间：
2004
影响因子：
2.5
通讯作者：
K. Furuya
中科院分区：
文献类型：
--
作者：
T. Yoshikawa;K. Furuya
为了将自然荧光法应用于chl a和初级产量的长期监测，研究了浮游植物的光吸收系数（a* ph）、光合作用与荧光的最大量子产率[（Φ c /Φ f） max]及其光饱和指数（k cf）的季节变化。于冬季至早春（1998年1月至4月）、春末（2000年5月）和夏季（2000年7月至8月）在日本东北海岸大池湾的一个监测站系泊了一个天然荧光传感器。生物光学参数a* ph， （Φ c /Φ f） max和k cf通过水样和孵育实验测定，每周2次。a* ph的时间变化以chl a的指数表示，这种关系随季节而变化。（Φ c /Φ f） max的变化与冬季至早春的chl a有关，与春末夏季的chl a和气温有关。在冬季和早春，k cf值相对较低且稳定；在春末至夏季，温度和光强也较高，其值较高。基于这些关系，在环境条件和浮游植物丰度波动较大的沿海水域实现了对chl a和天然荧光初级生成量的长期监测。正如本研究所表明的那样，通过在不同地区和季节开发算法，自然荧光方法有望用于初级生产的连续监测，通过系泊传感器网络具有高空间分辨率，即使在沿海水域也是如此。
In order to apply the natural fluorescence method for the long-term monitoring of chl a and primary production, the seasonal variation in the light absorption coefficient of phytoplankton (a* ph ), maximum quantum yield ratio of photosynthesis to fluorescence [(Φ c /Φ f ) max ], and its light saturation index (k cf ) were examined. The mooring of a natural fluorescence sensor was conducted during winter to early spring (January to April 1998), late spring (May 2000) and summer (July to August 2000) at a station in Otsuchi Bay on the north east coast of Japan. The bio-optical parameters, a* ph , (Φ c /Φ f ) max and k cf , were measured by water sampling and incubation experiments twice a week. The temporal variation in a* ph was expressed as an exponential of chl a. This relationship varied seasonally. The variations in (Φ c /Φ f ) max were related to chl a during winter to early spring, and to chl a and temperature during late spring and summer. The value of k cf was relatively low and stable during the winter and early spring; it reached higher values during late spring to summer, when temperature and light intensities were also higher. Based on these relationships, the long-term monitoring of chl a and primary production from natural fluorescence was realized in coastal water where environmental conditions and phytoplankton abundance fluctuated markedly. By developing algorithms in various areas and seasons, as the present study has shown, the natural fluorescence method is expected to be useful for continuous monitoring of primary production, with a high spatial resolution by a mooring web of sensors, even in coastal waters.
影响因子：
2.5
作者：
N. Ramaiah;T. Yoshikawa;K. Furuya
通讯作者：
N. Ramaiah;T. Yoshikawa;K. Furuya
影响因子：
1.9
作者：
SMITH, RC;BAKER, KS
通讯作者：
BAKER, KS